The Dukes of Mecklenburg-Schwerin were a noble family that ruled the duchy of Mecklenburg-Schwerin in northern Germany. Their reign began in the 12th century and continued until the early 20th century, playing a significant role in the region's political and cultural development. The dukes were known for their patronage of the arts and their involvement in the Holy Roman Empire. The duchy was part of the larger Mecklenburg region, which included other territories like Mecklenburg-Strelitz. The last duke, Friedrich Franz IV, ruled until the end of the monarchy in Germany after World War I. Today, the legacy of the dukes is reflected in the architecture and history of the area.